A223089 Numbers n, written in base 8, with the property that if the base-8 representation of n is read backwards, the result is 5*n.

1015, 11165, 102515, 112665, 1016015, 1127665, 10151015, 10252515, 11176165, 11277665, 101501015, 102617515, 111661165, 112777665, 1015001015, 1016016015, 1025252515, 1026267515, 1116511165, 1117526165, 1126762665, 1127777665

Offset: 1

Author

N. J. A. Sloane, Mar 23 2013

Keywords

• nonn
• base

Comments

For the decimal representations of these numbers, see A217742.

Theorem: There are 2^{floor(d/2)-2} terms with d base-8 digits.

Examples

			1015 reversed is 5101 = 5*1015 (calculating in base 8).
		

Crossrefs

Cf. A214927, A217742.